Make sure that your game is in order before you attemp the PAT. Are you looking to become a PGA Professional? If not, there are a number of better ways to test your game than a PAT. The PAT is designed to be a test for potential PGA Professionals. I know a number of very good players that had to play more than a few PATs before they passed and were able to move forward with thier professional careers.
It is 36 holes of MEDAL play in one day. The course is not normally setup very hard, but it is still not a piece of cake to pass. When I took mine we had a full field of 120 players, only 4 of us passed. I was the medalist, not sure how!